Staybolt structure



E. I. DODDS. .sTAYBoLI sTRucTuRE.

APPLICATION FILED JAN.20, 1920. 4 l,366,723. Patemed Jan. 25, 1921.

` 2 SHEETS-SHEET 2- A 110m eys 'in any suite-bl UNITED sTATEs PATENT oFsice.V

ETHAN i. DoDDs, or rI'r'rsBURGH, PENNSYLVANIA, Assreivoa To FLANNERY Bom COMPANY, or PITTSBURGH, PENNSYLVANIA.

STAYBOLT STBUCTURE.

Specification of Letters Patent.

Patented Jan. 25, 1921.

Application filed January 20, 1920. 'Serial No. 352,693.

clare the following to be a full, clear, and

exact description of the invcntion, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improveinents in st-ayboltJ structures for boilers,--one object of the invention being to provide simple means for mounting the outer end ,of a staybolt in a boiler sheet and inclosing the bolt head and the part which constitutes its bearing member, and to so construct and mount the bearing member and the closure member that said bearing member shall be seated on the boiler sheet and closu're member and be capable of universal adjustment relatively to both.

A further object is to provide a universally movablc or adjustable mounting` for a staybolt, which shall be so constructed that a staybolt may be employed having a head which need n'ot have a rounded or partly spherical portion where it engages the bearing member, thereby avoiding the necessity of providing a rounded seat in a bearing member for a rounded or partlyv spherical bolt head.

lVith these and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a sectional view, partly in elevation showing an embodiment of my invention', and Figs. 2, 3, 41 and 5 are views 'of modified constructions.

'l rep'resents the outer sheet of a boiler and 2, the inner Sheet. A staybolt 8 is secured manner'to the inner boiler sheet and its headed or enlarged outer end portion 4: is connected Vwith the outer boiler sheet Vas hereinafter described.

The out'er bo'ile'r Sheet 1 is 'provided with a'n openingI 5, an inner portion of whichimay be cylindrical and have a diameter appreciably greater 'than the 'diameter of the staybolt and the rem ain'ing portion of said openin'g :is'lmatle witha'rounded wallxto provide a rounded seat 6, on which an annular bearmg member 7 has a universally movable mountmg. The bearing member 7 is made with a rounded exterior face 8 conforming,` to the curvature of the seat 6 in the boiler sheet, and the interior of said annular bearmg member is made with two tapering portlons 9 and 10 extending from respective ends of said annular member and meeting intermediate of said ends, thus forming within the annular member, a ridge or shoulder 11 constituting` a seat located inter- Amedia-te the ends of said bearing member and which is engaged by the staybolt at the juncture of its headed portion with its body porti'on. n the construction shown in Fig. 1, the headed portion of the bolt is made tapering and engages the bearing member at or near the inner end of the taper.

The headed end of the bolt, as well as the w projecting portion of the bearing member and the opening in the boiler sheet, are inclosed by a housmg` or closure 12 having an annular lateral flange 13 and an annular flange 111, the latter disposed to seat on the `boiler sheet around and spaced from the opening` therein. At or near the juncture of the flange 13 with the body of the housing'or closure, an internal curved seat 15 is formed, against which the curved exterior portion 8 of the member '7 has a movable beai'ing, said seat 15 having a curvature conforming to the curvature of the exterior face of the bearing` member and that of the 'seat 6 in the boiler Sheet. The housing or closure 12 may, in the construction shown in Figs. 1, 2 and 8, be made'in a single piece and of such configuration and dimensions as to provide adequate clearance space 16 for the bolt head.

The flange 14% around the edge portion of the housing or closure 12 is united to the outer boiler sheet by a weld 17 It will be observed that the housing or closure provides an extended bearing at 15 for the bearing member and serves to hold the letter in place and prevent it from binding. i

In the construction shown in Fio'. 2, Vthe housing or closure is made with a flat outer end portio-n instead of being rounded as show-n in Fig. 1.v In Fig.V 2, the bearing member 7a is so tapered nteriorly as to 'proride a beveled or slightly tapering seat 18 at :its :upper end for. a. beveled shoulder 19 formed by the bolt head dia, and with a ta- `pering portion 10a. A housing 12b is mounted on and welded to the boiier sheet and fermed with a seat 15 against which the curved exterior of the member 7a bears.

In Fig. 8, the bearing member '7b is made with a straight or cylindrical bore 20 through which the boit passes, and the iatter is made'with head 4b, the inner portion 10 of which is at right angies to the body of the boit and rests upon the outer end of the bearing member 7b. The housiirglc which is weided to the boiler sheet, is made with a seat c against which the Curved exterior 15 of member 7 b bears. In the construction shown in Fig. 4-, the housing or tclosure is made in two parts,

comprising a ring 12a which surrounds the opening in the outer boiier sheet and also the projecting por'tion of the bearing member and the enlarged or headed end of the boit and is fiXedly united to the outer boiier sheet by avweld 13a, and a ping 17a. The ring 12a is provided intcriorly 'with an an- 'nnlar fiange lli having a rounded inner t face 15a, the curvature of which is the same as that of the exterior portion 8 of the bearing member 7 and constitutes an extended seat for thel lat-ter to hold it properiy in place and prevent binding.V

i The ring 12a isthreaded interi'orly as at 16a for the reception of the plug 17, the latter having an angular portion 18a to receive a wrench. The plug 17a is made hollowrand provides a ciearance 19a for the outer or headed end of the staybo1t,and a gasket 20EL may be located between the inner end of said closure and the fiange 14a.

In the construction shown in Fig. 5, the rounded seat 6 in the boiler sheet may extend moreinearly through the thickness of the sheet than shown in Pig. 1, and the bearing therein andprovided with a seat against ing` member 7 is made with a cyiindrical i bore 21 through which the staybolt 3 passes and the outer end of said bearing member is flattened to form a seat 22 on which a shoulder 23 formed by the head 24 of Jthe staybolt is mounted. Inother respects, the 'construction shown in Fig. 5 is Vsimilar Vto that shown in Fig. 4-. i i

Havin'g fully describedmy invention Iwhat IA claim as new and desire to secure by Letters-Patent, is 2-- 1. In a staybolt structure, the 'combination with a boiler sheet having an opening, a closure secured to the boiler sheet around said opening, and a staybolt, of a bearing mem- 'ber having a rounded exterior portion movably mounted against the boiler sheet and said closure and aifording a mounting for the staybolt. v

2. In a staybolt structure, the combination with' a boiler sheet having an opening, of an annular'bearing member having a rounded .65" exterior ;movably imounted in theopening vin with a boler sheet having an opening, of an annular bearing member provided lwith a. rounded exterior and having universally movable mounting in said opening,1 a staybolt passing through said bearing member and provided with a headed' outer end having a movabie connection with said bearing member, and means for housing the headed end of the staybolt and the bearing member. i

4. In a staybolt structure, the combination with a boiler sheet having an opening, of an annular bearing member lhaving` a universaliy movable mounting` in said opening, said bearing member having a seat for a headed staybolt, a headed staybolt passing through said bearinge member and movably mounted on said seat, and a .closure weldedv to the boiler sheet around the openwhich the v curved exterior of the bearing member has movable engagement.

' 5. In a staybolt structure, the combination with a boiler'sheet having an opening, of an annuiar bearing member having universaily inovabie mounting in said opening, said bearing member having a4 ridge the-rein between its ends forming a seat; a staybolt passing through said bearing member and having a headed end, said stay bolt movably ongaging the seat in the bearing member adjacent to the inner end-of said headed end, and a 'closure welded to the boiler sheet and having a seat for the rounded eXterior of the annular bearing member.

6. In a staybolt structure, the combination with a boiiersheethaving an opening, of an annuiar bearing member having universally movable mounting in said opening and having 'a seat, Va staybolt 'passing through said bearing member and having an eniarged end mounted on the seat of saidbearrng member1 a two-part closure comprising a housing ring surrounding the opening` in the .boiler sheet, the projecting portionof the. bearing member and the eniarged end of the bolt and welded to the boiler sheet, said housing ring 'having an internal flange constituting anextended seat for the exterior portion of the bearing .member and means removably secured to said housing ring and closing the same. i i

.L In a staybolt saructure, the combinatlon with a boiiersheet provided with an opening having a rounded wall, of an annular bearing member having an exterior rounded portion universally movable on the rounded Wall of the opening in the boiler sheet and having a seat, a staybolt passing through said beai'ing member and having an enlarged end mounted on the seat of said bearing member, a two-part e10- sure eomprising a housing ring welded to the boiler Sheet and having an internal fiange aflording an extended bearing for the 10 rounded exterior portion of the bearing member and a removable member closing said housing ring.

In testimony Whereof I specification.

ETI-IAN I. DODDS.

have signed this 

